1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * cxd2880_io.c |
4 | * Sony CXD2880 DVB-T2/T tuner + demodulator driver |
5 | * register I/O interface functions |
6 | * |
7 | * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation |
8 | */ |
9 | |
10 | #include "cxd2880_io.h" |
11 | |
12 | int cxd2880_io_common_write_one_reg(struct cxd2880_io *io, |
13 | enum cxd2880_io_tgt tgt, |
14 | u8 sub_address, u8 data) |
15 | { |
16 | if (!io) |
17 | return -EINVAL; |
18 | |
19 | return io->write_regs(io, tgt, sub_address, &data, 1); |
20 | } |
21 | |
22 | int cxd2880_io_set_reg_bits(struct cxd2880_io *io, |
23 | enum cxd2880_io_tgt tgt, |
24 | u8 sub_address, u8 data, u8 mask) |
25 | { |
26 | int ret; |
27 | |
28 | if (!io) |
29 | return -EINVAL; |
30 | |
31 | if (mask == 0x00) |
32 | return 0; |
33 | |
34 | if (mask != 0xff) { |
35 | u8 rdata = 0x00; |
36 | |
37 | ret = io->read_regs(io, tgt, sub_address, &rdata, 1); |
38 | if (ret) |
39 | return ret; |
40 | |
41 | data = (data & mask) | (rdata & (mask ^ 0xff)); |
42 | } |
43 | |
44 | return io->write_reg(io, tgt, sub_address, data); |
45 | } |
46 | |
47 | int cxd2880_io_write_multi_regs(struct cxd2880_io *io, |
48 | enum cxd2880_io_tgt tgt, |
49 | const struct cxd2880_reg_value reg_value[], |
50 | u8 size) |
51 | { |
52 | int ret; |
53 | int i; |
54 | |
55 | if (!io) |
56 | return -EINVAL; |
57 | |
58 | for (i = 0; i < size ; i++) { |
59 | ret = io->write_reg(io, tgt, reg_value[i].addr, |
60 | reg_value[i].value); |
61 | if (ret) |
62 | return ret; |
63 | } |
64 | |
65 | return 0; |
66 | } |
67 | |